Brian Andrew Znotins, vice president of United Airlines Atlantic and Pacific Sales, introduces the new non-stop service between Chengdu and San Francisco in San Francisco, the United States, Aug. 30, 2013. United Airlines is to offer a non-stop service between Chengdu, capital of southwest China's Sichuan Province, and San Francisco of the United States from June 11 next year.(Xinhua/Liu Yilin)